What if the purpose of Santa Claus is to get children used to the idea of complicity with a lie? Children who discover Santa Claus’s non-existence are normally exhorted to keep that truth from younger children. If they obey, they gain the satisfaction of joining the adult world in some small way. If they disobey, they will risk the guilt of depriving someone of enjoyment — truth hurts. Either way, the gap between the “official position” and private opinions opens up, and a whole lot of ideological effort is expended to remind us how important it is to make sure the “official position” can still function. Indeed, many Christmas movies even model a kind of “second naïveté” about the Santa Claus myth, when they’re not presenting it as openly true (and hence implicitly calling into question the origins and motivations of the debunking stance). Why embrace the truth? Isn’t it more magical and special to hang on to the implausible lie? Shouldn’t we admire and imitate the naive trust of children, instead of being so caught up with what’s “true” or “real”?
In short, Santa Claus is not merely ideology at its very purest — it’s about ideology at its very purest. Its purpose is to induct children into the very order of ideology.